Consolidated Statements of Changes in Shareholders' Equity - USD ($)	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Total
Balance at Mar. 31, 2019	$ 99,800	$ 62,666,400	$ (57,614,100)	$ 103,635,100	$ 108,787,200
Balance (in shares) at Mar. 31, 2019	8,468,529
Increase (Decrease) in Stockholders' Equity
Proceeds from issuance of stock	$ 700	797,300			798,000
Proceeds from issuance of stock (in shares)	72,430
Treasury stock purchases			(882,100)		(882,100)
Treasury stock purchases (in shares)	(55,321)
Non-cash stock compensation expense	$ 400	1,174,200			1,174,600
Non-cash stock compensation expense (in shares)	43,786
Exercise of stock options (in dollars)	$ 500	680,600			681,100
Exercise of stock options (in shares)	48,125
Cash dividends paid				(5,287,200)	(5,287,200)
Net income (loss)				(21,568,900)	(21,568,900)
Balance at Mar. 29, 2020	$ 101,400	65,318,500	(58,496,200)	76,779,000	83,702,700
Balance (in shares) at Mar. 29, 2020	8,577,549
Increase (Decrease) in Stockholders' Equity
Proceeds from issuance of stock	$ 1,300	699,700			701,000
Proceeds from issuance of stock (in shares)	130,907
Treasury stock purchases			(121,600)		(121,600)
Treasury stock purchases (in shares)	(23,031)
Non-cash stock compensation expense	$ 1,500	1,209,500			$ 1,211,000
Non-cash stock compensation expense (in shares)	148,408
Exercise of stock options (in shares)					0
Retirement of treasury stock			58,555,000	(58,555,000)
Net income (loss)				(8,742,900)	$ (8,742,900)
Balance at Mar. 28, 2021	$ 104,200	67,227,700	(62,800)	9,481,100	$ 76,750,200
Balance (in shares) at Mar. 28, 2021	8,833,833				8,833,833
Increase (Decrease) in Stockholders' Equity
Issuance of common stock for 401k match	$ 700	432,100			$ 432,800
Issuance of common stock for 401k match (in shares)	67,556
Proceeds from issuance of stock	$ 300	157,200			157,500
Proceeds from issuance of stock (in shares)	30,169
Treasury stock purchases			(66,400)		(66,400)
Treasury stock purchases (in shares)	(8,950)
Non-cash stock compensation expense	$ 700	1,338,200			1,338,900
Non-cash stock compensation expense (in shares)	69,141
Exercise of stock options (in dollars)		10,900			$ 10,900
Exercise of stock options (in shares)	2,500				2,500
Net income (loss)				(2,700,800)	$ (2,700,800)
Balance at Mar. 27, 2022	$ 105,900	$ 69,166,100	$ (129,200)	$ 6,780,300	$ 75,923,100
Balance (in shares) at Mar. 27, 2022	8,994,249				8,994,249